Split Mica Capacitor Dielectrics
Split mica capacitor dielectrics are ultra-thin layers of split mica, silvered on one side, used as dielectrics in high-frequency capacitors. They are precision-cleaved to achieve consistent thickness. These dielectrics are classified under tariff item 6814.90.00 as worked mica articles before final capacitor assembly.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the dielectrics are imported as part of complete capacitors.
Capacitors are classified under heading 85.32, not as mica articles.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the dielectrics are not complete capacitors, which would be classified under Chapter 85
• Provide thickness and silvering specifications to CBSA
• Ensure the mica is not coated with materials that could change the tariff classification
Related Products under Tariff item 6814.90.00
Agglomerated Mica Heating Element Plates
Agglomerated mica heating element plates are manufactured by bonding reconstituted mica with heat-resistant binders, then pressing them into flat plates. These plates are designed to support heating wires in electric heaters and toasters, where they provide electrical insulation and thermal stability. They fall under tariff item 6814.90.00 as articles of agglomerated mica, not elsewhere specified.
Agglomerated Mica Kiln Shelves
Agglomerated mica kiln shelves are large, flat panels made from reconstituted mica bonded with inorganic binders, capable of withstanding temperatures up to 1000°C. They are used in kilns to support pottery and ceramics during firing. These shelves are classified under tariff item 6814.90.00 as other articles of agglomerated mica.
Mica Electrical Insulation Sheets
Mica electrical insulation sheets are thin, flexible sheets made from worked mica, either split or cleaved, used to insulate electrical components in motors and transformers. They provide high dielectric strength and heat resistance. These sheets fall under tariff item 6814.90.00 as articles of worked mica not specified elsewhere.
Mica RF Window Disks
Mica RF window disks are circular pieces of worked mica that are transparent to radio frequencies, used in high-power RF transmitters as vacuum windows. They are made from high-quality muscovite mica, carefully cleaved and shaped. These disks are classified under tariff item 6814.90.00 as articles of worked mica.
Mica Shim Stock Sheets
Mica shim stock sheets are precision-cut sheets of worked mica used as shims for aligning machinery in precision equipment. They are made from split mica, cut to exact thicknesses for spacing and leveling. These sheets fall under tariff item 6814.90.00 as other articles of worked mica for industrial use.
Mica Vacuum Tube Spacers
Mica vacuum tube spacers are stamped washers and spacers made from worked mica, used to insulate electrodes in vacuum tubes for radios and amplifiers. They are precision-cut to fit specific tube designs and provide thermal and electrical insulation. These spacers are classified under tariff item 6814.90.00 as articles of worked mica.